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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 344 · 40 questions
TalentJR

Remember (One part, one job): Resistor: limits current. Capacitor: stores a little charge. Diode: one way only. LED: one way and glows. Buzzer: sound. Motor: spinning. Potentiometer: a knob that changes resistance. LDR: light sensor. Thermistor: heat sensor. Fuse: protects by blowing. Transistor: boosts or switches.

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  1. 1.True or false: a motor senses how hot it is. (a) True (b) False
  2. 2.What does a diode do? (a) makes a beeping sound (b) makes things spin (c) lets current go one way (d) turns a fan or wheels
  3. 3.What does a motor do? (a) senses how hot it is (b) senses how bright it is (c) boosts a small signal (d) turns a fan or wheels
  4. 4.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a buzzer (d) a diode
  5. 5.What does a resistor do? (a) senses how hot it is (b) makes a beeping sound (c) limits the current (d) smooths a wobbly supply
  6. 6.True or false: a thermistor senses how hot it is. (a) True (b) False
  7. 7.What does a fuse do? (a) blows if current is high (b) stores a little charge (c) makes a beeping sound (d) beeps for an alarm
  8. 8.🧩 Which part changes electrical energy into movement? (a) a motor (b) an LED (c) a fuse (d) a resistor
  9. 9.🧩 Which component boosts a small signal? (a) buzzer (b) transistor (c) capacitor (d) fuse
  10. 10.True or false: a fuse turns a fan or wheels. (a) True (b) False
  11. 11.What does a capacitor do? (a) smooths a wobbly supply (b) makes things spin (c) senses how hot it is (d) beeps for an alarm
  12. 12.🧩 Which component turns a fan or wheels? (a) motor (b) transistor (c) LED (d) diode
  13. 13.What does a resistor do? (a) has coloured bands (b) blows if current is high (c) senses how bright it is (d) beeps for an alarm
  14. 14.🧩 Which component has coloured bands? (a) fuse (b) resistor (c) potentiometer (d) transistor
  15. 15.🧩 Which component makes a beeping sound? (a) buzzer (b) transistor (c) LED (d) resistor
  16. 16.What does a potentiometer do? (a) is a resistance knob (b) makes things spin (c) has coloured bands (d) senses how hot it is
  17. 17.True or false: an LED stores a little charge. (a) False (b) True
  18. 18.True or false: a resistor makes a beeping sound. (a) False (b) True
  19. 19.True or false: a capacitor makes things spin. (a) True (b) False
  20. 20.True or false: a buzzer boosts a small signal. (a) False (b) True
  21. 21.True or false: a buzzer makes a beeping sound. (a) True (b) False
  22. 22.True or false: a transistor smooths a wobbly supply. (a) True (b) False
  23. 23.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) measure heat (d) store charge briefly
  24. 24.🧩 Which component beeps for an alarm? (a) fuse (b) LDR (c) buzzer (d) resistor
  25. 25.True or false: a resistor limits the current. (a) False (b) True
  26. 26.True or false: a resistor turns a fan or wheels. (a) True (b) False
  27. 27.What does a capacitor do? (a) stores a little charge (b) makes things spin (c) senses how hot it is (d) makes a beeping sound
  28. 28.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  29. 29.🧩 Which component lets current go one way? (a) capacitor (b) diode (c) buzzer (d) thermistor
  30. 30.True or false: an LDR turns a fan or wheels. (a) False (b) True
  31. 31.True or false: a capacitor stores a little charge. (a) False (b) True
  32. 32.What does a thermistor do? (a) senses how hot it is (b) boosts a small signal (c) makes things spin (d) smooths a wobbly supply
  33. 33.🧩 Which component limits the current? (a) LED (b) motor (c) transistor (d) resistor
  34. 34.🧩 Which component is a resistance knob? (a) motor (b) resistor (c) potentiometer (d) LED
  35. 35.🧩 Which component senses how bright it is? (a) capacitor (b) transistor (c) buzzer (d) LDR
  36. 36.🧩 Which component stores a little charge? (a) buzzer (b) fuse (c) diode (d) capacitor
  37. 37.True or false: a resistor beeps for an alarm. (a) True (b) False
  38. 38.🧩 Which component makes things spin? (a) resistor (b) motor (c) LDR (d) capacitor
  39. 39.True or false: a buzzer beeps for an alarm. (a) False (b) True
  40. 40.True or false: an LED glows using little power. (a) False (b) True

Answer key

  1. False
  2. lets current go one way
  3. turns a fan or wheels
  4. a buzzer
  5. limits the current
  6. True
  7. blows if current is high
  8. a motor
  9. transistor
  10. False
  11. smooths a wobbly supply
  12. motor
  13. has coloured bands
  14. resistor
  15. buzzer
  16. is a resistance knob
  17. False
  18. False
  19. False
  20. False
  21. True
  22. False
  23. store charge briefly
  24. buzzer
  25. True
  26. False
  27. stores a little charge
  28. True
  29. diode
  30. False
  31. True
  32. senses how hot it is
  33. resistor
  34. potentiometer
  35. LDR
  36. capacitor
  37. False
  38. motor
  39. True
  40. True

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